mirror of
https://github.com/mudler/LocalAI.git
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eed5706994
Refactor: channel based llm flow and services split --------- Signed-off-by: Dave Lee <dave@gray101.com>
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
package openai
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import (
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"bufio"
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"bytes"
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"encoding/json"
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"fmt"
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fiberContext "github.com/go-skynet/LocalAI/core/http/ctx"
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"github.com/go-skynet/LocalAI/core/services"
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"github.com/go-skynet/LocalAI/core/schema"
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"github.com/gofiber/fiber/v2"
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"github.com/rs/zerolog/log"
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"github.com/valyala/fasthttp"
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)
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// CompletionEndpoint is the OpenAI Completion API endpoint https://platform.openai.com/docs/api-reference/completions
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// @Summary Generate completions for a given prompt and model.
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// @Param request body schema.OpenAIRequest true "query params"
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// @Success 200 {object} schema.OpenAIResponse "Response"
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// @Router /v1/completions [post]
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func CompletionEndpoint(fce *fiberContext.FiberContextExtractor, oais *services.OpenAIService) func(c *fiber.Ctx) error {
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return func(c *fiber.Ctx) error {
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_, request, err := fce.OpenAIRequestFromContext(c, false)
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if err != nil {
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return fmt.Errorf("failed reading parameters from request:%w", err)
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}
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log.Debug().Msgf("`OpenAIRequest`: %+v", request)
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traceID, finalResultChannel, _, _, tokenChannel, err := oais.Completion(request, false, request.Stream)
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if err != nil {
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return err
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}
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if request.Stream {
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log.Debug().Msgf("Completion Stream request received")
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c.Context().SetContentType("text/event-stream")
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//c.Response().Header.SetContentType(fiber.MIMETextHTMLCharsetUTF8)
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//c.Set("Content-Type", "text/event-stream")
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c.Set("Cache-Control", "no-cache")
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c.Set("Connection", "keep-alive")
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c.Set("Transfer-Encoding", "chunked")
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c.Context().SetBodyStreamWriter(fasthttp.StreamWriter(func(w *bufio.Writer) {
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for ev := range tokenChannel {
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var buf bytes.Buffer
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enc := json.NewEncoder(&buf)
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if ev.Error != nil {
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log.Debug().Msgf("[CompletionEndpoint] error to debug during tokenChannel handler: %q", ev.Error)
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enc.Encode(ev.Error)
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} else {
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enc.Encode(ev.Value)
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}
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log.Debug().Msgf("completion streaming sending chunk: %s", buf.String())
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fmt.Fprintf(w, "data: %v\n", buf.String())
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w.Flush()
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}
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resp := &schema.OpenAIResponse{
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ID: traceID.ID,
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Created: traceID.Created,
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Model: request.Model, // we have to return what the user sent here, due to OpenAI spec.
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Choices: []schema.Choice{
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{
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Index: 0,
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FinishReason: "stop",
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},
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},
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Object: "text_completion",
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}
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respData, _ := json.Marshal(resp)
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w.WriteString(fmt.Sprintf("data: %s\n\n", respData))
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w.WriteString("data: [DONE]\n\n")
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w.Flush()
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}))
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return nil
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}
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// TODO is this proper to have exclusive from Stream, or do we need to issue both responses?
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rawResponse := <-finalResultChannel
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if rawResponse.Error != nil {
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return rawResponse.Error
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}
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jsonResult, _ := json.Marshal(rawResponse.Value)
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log.Debug().Msgf("Response: %s", jsonResult)
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// Return the prediction in the response body
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return c.JSON(rawResponse.Value)
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}
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}
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